NTA UGC NET/JRF Exam, June -2020 (Electronic Science)

Total Questions: 100

11. The Fourier series expansion of a periodic function with half wave symmetry contains:

Correct Answer: A. only even harmonics

12. The Fourier transform of x [-n] is:

Correct Answer: A. X* (e⁻ʲʷ)

13. The slew rate for a 741 is 0.5 V/μ second, The combination of maximum frequencies for an undistorted sine-wave output of 10 V peak and 1 V peak are approximately:

Correct Answer: D. 2 kHz and 20 kHz

14. Which of the following is not a component of basic Phase-Locked Loop (PLL)?

Correct Answer: D. Low-pass filter

15. If T, and Tᴀ are junction temp. and ambient temp respectively θᴊc θcs and Osᴀ are transistor thermal resistance, insulator thermal resistance and heat-sink thermal resistance respectively. The equation of maximum power dissipation is given by:

Correct Answer: C.

16. Read the statement.

Correct Answer: C.

17. Which of the following statements is not correct about a CPLD (Complex Progammable Logic Device)?

Correct Answer: В. А СРPLD is based on Product-Of-Sums (POS) architecture

18. The final code after encoding data bits 1101 into 7-bit even parity Hamming Code is:

Correct Answer: C. 1010101

19. The A/O gates in which an addition variable or a combination of variables can be included in the logic operation are called:

Correct Answer: B. Expandable Gates

20. The statement which is not applicable to a Moore machine:

Correct Answer: D. The characteristic equation of output Z(t) can be given as Z(t)= g{S(t), x(t)} where S(t) represents present state, x(t) indicates present input